Magneto-frame



P. J. R. POSTEL-VINAY.

MAGNETO FRAME.

APPLICATION FILED OCT. I3, 1919.

1,349,692, Patented Aug. 17,1920.

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MAGNETO FRAME.

APPLICATION FILED OCT. 13, 1919.

Patented Aug. 17, 1920.

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UNITED STATES PIERRE JEAN RENE POSTEL-VINAY, OF PARIS, FRANCE.

ASSIGNOR TO SOCIETE DES MQTEURS SALMSON (SYSTEME CANTON-UNNE), OF PARIS,SEINE, FRANCE.

MAGNETO-FRAME.

Specification of Letters Patent.

Patented All". 17, 1920.

Application filed October 13, 1919. Serial No. 330,472.

To (27/ uizom it may conccrn lie it known that l. PIERRE JEAN RENElos'rnL-"A'ixxi'. a citizen of the Republic of France. residing at 46Boulevard de la TourJlaubourg. Paris. Seine. in the Republic of Francehave invented new and useful Improvements in Magnet'o-Frames, of whichthe following is a specilication.

Magneto frames are usually provided with a removable part or lid whichcovers the brush holder used for receiving the cur rent from thearmature. According to present practice. such lid is secured upon aplane surface of the frame and centering is obtained by means of thefastening screws only.

This invention has for its object fastening means for securing the lidupon the frame in which the cooperating bearing surfaces of the frameand lid comprise a llat annular surface and a conical surface extendingover a certain arc the lid being fastened to the frame by means ofinclined screws so as to insure a proper contact between the saidbearing surfaces.

In the annexed drawing given by way of example:

Figure l is a vertical section along the line -\B. Fig. 2. of a frameprovided with its lid and mounted upon a plate used for machining saidframe on a lathe.

Fig. :2 is a corresponding plan view.

Fig. is an enlarged sectional vie along the line E F. Fig. 2 showing thecooperating bearing surfaces.

1. is the frame of the magneto and c is the removable part or lidthereof. which covers the brush-holder for the armature, not shown. Thelid is supported on the frame by two adjacent bearing surfacescomprising a llat arcuated surface shown in section at r/ extending overa certain are r 1' (Fig. 2) and a conical surface d 7.: extending overthe same arc.

The lid is secured in position by screws 1* which are set at an angle soas to take advantage of the thicker portions of the frame and clamp thelid at the same time against the cone shaped and plane bearing surfaces.The heads of said screws can thus be concealed within the lid, whichimproves the general appearance of the frame.

The aforesaid bearing surfaces may be easily obtained on a lathe.

1n connectionwith the bearing surfaces on the frames, it will be ofadvantage to use the shown in Figs. 1 and 2 which comprise the plate jprovided with an up right portion 121. having a boss n upon which theframe is centered. The part m has such a reduced width and the radius ofthe circle 0 (Fig. 2) corresponding to the bearing surfaces of the frameis sufliciently great so that the tool will clear the opposite end ofthe frame 7) as well as the part a of the jig in the turning operation.

It will be seen that by means of the above described arrangement the lidis strongly fixed upon the fram2 and is perfectly centered. thefastening screws are sufficiently concealed and the parts may be turnedout very economically on a lathe.

The invention is not restricted to the details of execution shown ordescribed which have been indi ':ated by way of example only.

Having now described my invention what I claim as new and desire tosecure by Letters latent is:

1. The combination of a magneto frame provided with an arcuated planebearing surface and an arcuated conical bearing surface. a removable lidhaving corresponding bearing surfaces adapted to engage the bearingsurfaces on the magneto frame respectively. and means for securing thelid to the frame.

The combination of a magneto frame provided with an arcuated planebearing surface and an arcuated conical bearing surface. a removable lidhaving corresponding 1 aring surfaces adapted to engage the bearingsurfaces on the magneto frame respectively. and inclined fasteningscrews extending through the lid and screwed into the frame.

3. The combination of a magneto frame provided with an arcuated planebearing surface andv an arcuated conical bearixiig "surface, a removablelid having correspon ing bearing surfaces adapted to engage thebearingsurfaces on the magneto frame refs'pectivel and, means forsecuring the lid. to the i'ame, the said arcuated bearing surfaces beingformed on such a radius that eeeeoe the Whole of the frame is locatedWithin the corresponding circle whereby the hearing surfaces on theframe may be easily 10 machined on a lathe.

In testimony whereof I have signed my name to this specification.

PIERRE JEAN RENE POSTEL-VINAY.

